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A test tube is prepared with basophil stimulation buffer (BSB) including Interleukin 3 and an allergen which is to be tested. The blood sample is added and the tube is incubated at 37 °C for several minutes, to ensure that the allergens can bind to the IgE. By adding EDTA to the test tube, the degranulation process is stopped immediately ...
The degranulation of basophils can be investigated in vitro by using flow cytometry and the so-called basophil-activation-test (BAT). Especially, in the diagnosis of allergies including of drug reactions (e.g. induced by contrast medium ), the BAT is of great impact.
Degranulation is a cellular process that releases antimicrobial, cytotoxic, or other molecules from secretory vesicles called granules found inside some cells. It is used by several different cells involved in the immune system , including granulocytes ( neutrophils , basophils , eosinophils , and mast cells ).
K252b also suppresses the IgE receptor-mediated histamine release and to a lower extent also 150 nM TPA mediated histamine release in mast cells and human basophil cells. Degranulation is, like increase in the cytosolic Ca 2+ concentration, an essential step in the activation of the immune response of mast cells and human basophil cells. [8]
There are four types of granulocytes (full name polymorphonuclear granulocytes): [3] Basophils; Eosinophils; Neutrophils; Mast cells; Except for the mast cells, their names are derived from their staining characteristics; for example, the most abundant granulocyte is the neutrophil granulocyte, which has neutrally staining cytoplasmic granules.
CD63 is a good marker for flow cytometric quantification of in vitro activated basophils for diagnosis of IgE-mediated allergy. The test is commonly designated as basophil activation test (BAT). The test is commonly designated as basophil activation test (BAT).
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The Benveniste affair (French: [bɛ̃venist]) [1] was a major international controversy in 1988, when Jacques Benveniste published a paper in the prestigious scientific journal Nature describing the action of very high dilutions of anti-IgE antibody on the degranulation of human basophils, findings that seemed to support the concept of homeopathy.